61results about How to "Short filter time" patented technology

The invention discloses a novel technique for extracting L-tryptophan from fermentation broth, which includes the following steps that: fermentation broth is pretreated, and the treated liquid is pumped into a ceramic microfiltration membrane filter, so that tryptophan microfiltrate without mycelium and mycoprotein are obtained; the tryptophan microfiltrate is pumped into an ultrafiltration membrane filter, so that tryptophan ultrafiltrate and concentrated liquid containing pigment and protein are obtained; the tryptophan ultrafiltrate is pumped into a nanofiltration membrane filter, so that concentrated tryptophan liquid and permeate containing salt are obtained; waste filtrate is comprehensively utilized to produce protein feed; industrial ethylic acid is used for promoting low-temperature crystallization, crystallization mother liquid is treated by the ion exchange method and used, and after crystals are centrifugally dehydrated and dried, the L-tryptophan product is obtained. The invention solves the problem on how to recover industrial ethylic acid, and greatly increases the extraction rate of L-tryptophan; and since the filtrate and the mycoprotein are comprehensively utilized, the product profit is maximized. The total extraction rate of L-tryptophan is 85.2 percent, and the refined product meets the standards of Chinese Pharmacopoeia edition 2005.

The invention discloses a production method for extracting tryptophan from fermentation liquor by one-step refining, which comprises the pretreatment of the fermentation liquor. In the method, mycoprotein is filtered off by using a ceramic microfiltration membrane, is decolorized by using an ultrafiltration membrane and is desalted and concentrated by using a nanofiltration membrane; the nanofiltration membrane concentrated liquor is directly decolorized by using activated carbon, the decolorized liquor is subjected to isoelectric point crystallization at a low temperature, and a qualified competitive product is obtained by rinsing with ice water during centrifugal separation; the crystallization mother liquor returns to the nanofiltration membrane for circulation; protein feed with high additional value is prepared by mixing, drying and crushing the ultrafiltration strong liquor and mycoprotein; and nanofiltration strong brine can be used as a culture medium for later use or sold serving as a base fertilizer. The method has the advantages of avoiding adding an organic solvent and an inorganic solvent in the preparation process of a crude product and a fine product, saving the solvent recovery cost, solving the problems of sewage treatment and environmental pollution, along with high utilization rate of the mother liquor, high product quality, and more contribution to industrial production, wherein the total extraction yield of L-tryptophan is 83.5 percent in a 500-ton production line.

The invention relates to a preparation method of electronic grade ceric sulfate, which comprises the following steps: 1)adding a dilute nitric acid solution in cerous carbonate to obtain a cerium nitrate solution; 2)dropping an ammonium carbonate aqueous solution in the solution, heating until the mass concentration of the cerium nitrate solution is 220-240g/L; 3)filtering; 4)adding a filtrate in a micropore filter for filtering; 5)adding hydrogen peroxide with volume concentration being 30% in the filtrate, dropping aqueous ammonia in the filtrate, controlling the reaction temperature being 30-35 DEG C; 6)performing plate filtration to obtain the sediment; 7)adding a cerium hydroxide filter cake in excessive concentrated sulfuric acid; 8)adding concentrated sulfuric acid in the solution, concentrating for reacting for 5 hours, filtering to obtain the ceric sulfate crystal; and 9)dehydrating the ceric sulfate crystal to obtain the electronic grade ceric sulfate. The preparation method has the following beneficial effect that 1)filtering time is short, yield is high; 2)product oxidation rate is high; 3)products purity is high; 4)products fineness is high; and 5)products non rare earth metal impurity is low.

The invention discloses a press ink recovery device comprising a shell. A strainer is fixedly connected to the inner wall of the shell. A support block is fixedly connected to the left side of the topof the shell. A first oil outlet pipe is arranged on the left side of the support block. The right end of the first oil outlet pipe penetrates through the support block and extends to the right sideof the support block. The surface of the first oil outlet pipe is fixedly connected to the inner wall of the support block. The right end of the first oil outlet pipe is sleeved with a telescopic pipe. The right end of the telescopic pipe is connected with a second oil outlet pipe in a sleeving mode. Through mutual matching of a slider, a sliding block, a buffer spring, a rotary motor, a rotary shaft, a reel, a fixed rope, an electric push rod, a brush, a second through groove and a waste box, the effect of high filtration efficiency is achieved, the problem of low filtration efficiency of a press ink recovery device is solved, thus filtration time is short, the filtration effect is good, work efficiency is improved greatly, progress delay of subsequent work is avoided, and great convenience is brought to a user.

The invention relates to a preparation method of chitosan fibers, overcomes the shortcomings, such as low solution concentration, long dissolving time, difficult filtering, long defoaming time, instable product quality and low fiber strength, of the chitosan fiber preparation process at present, and adopts 2-5% glacial acetic acid as solvent, where a chitosan tablet raw material is added at a room temperature and stirred for 15-30 min. A double-screw pump is adopted for cyclic delivery for 1 hr, to fully dissolve the preparation, and also used to press-filter the solution and feed it into a vacuum tank for deforming for 2-4 hr to obtain 0.5-30% homogenous-phase transparent chitosan spinning fluid. A spinning machine is adopted for spinning, the yarn extruded by a metering pump enters a condensation bath, and high-strength chitosan fibers are obtained by drawing, water washing, alcohol washing and drying.

The invention discloses a ceramic filter element, a preparation method and an application thereof. The preparation method comprises the following step: sintering a filter element blank, wherein in thesintering process, the sintering temperature is divided into 3-6 sections. The ceramic filter element has the advantages of high mechanical strength, good filter effect, free of heavy metal pollution, high yield, low cost and short process consumed time, 20-30% of time is shortened compared with that of a conventional process, and the ceramic filter element is suitable for water quality treatment.

The present invention provides a real-time translation method of video captions. The method comprises: performing multi-channel extraction of original images captured in video, and obtaining a plurality of single-channel images; based on the MSER algorithm, extracting MSER areas of the original images and the single-channel images; calculating the local contrast between each MSER area and a background area, determining whether the corresponding MSER areas are filtered or not according to each local contrast; determining the boundary key points of each MSER area; taking the boundary key points as classification screening characteristics, performing classification screening of the each residual MSER area after filtering through a trained SVM, and obtaining a test area; according to a distance between each two adjacent test areas on the vertical direction, performing test distinguishing of each test area, and according to a distance between each two adjacent test areas on the same test line, performing classification of each test area of the same test line; and performing real-time translation of video captions based on each test area after classification.

The invention relates to a wastewater centrifugal filtering device for a water jet loom. The wastewater centrifugal filtering device comprises a water intake pipe, a filtering box and a water drain pipe, wherein the water drain pipe is connected with the filtering box; a filtering cylinder and a driving device are arranged in the filtering box, and the driving device is used for driving the filtering cylinder to rotate; the filtering cylinder is of a cylindrical structure of which the upper end is provided with an opening; a cover plate is arranged at the opening; the cover plate is provided with a water inlet and a bearing block, and the bearing block is connected with the water inlet; the water intake pipe penetrates through the bearing block and enters the filtering cylinder; a circularhole is formed in the side wall of the filtering cylinder, and is used for allowing a water body to penetrate through. The wastewater centrifugal filtering device has the advantages that by arrangingthe filtering cylinder with the circular hole and the driving device for driving the filtering cylinder to rotate, the wastewater of the water jet loom is sent into the filtering cylinder, and is directly subjected to centrifugal filtering; compared with other filtering devices for treating the wastewater by multiple filtering layers, the filtering time is shorter, the working efficiency is higher, the arrangement of multiple filtering materials is not needed, and the production cost is lower.

The invention discloses a multilayer membrane filtration system of fruit vinegar. The multilayer membrane filtration system comprises a fruit vinegar storage tank used for storing unfiltered fruit vinegar, wherein the fruit vinegar in the fruit vinegar storage tank is transported by a No. 1 pipeline to No. 1 membrane filtration equipment for filtration under the action of a No. 1 pressure pump, the filtered fruit vinegar is transported to a No. 1 filtration tank, the fruit vinegar in the No. 1 filtration tank is transported by a No. 2 pipeline to No. 2 membrane filtration equipment for filtration under the action of a No. 2 pressure pump, the filtered fruit vinegar is transported to a No. 2 filtration tank, the fruit vinegar in the No. 2 filtration tank is transported by a No. 3 pipeline to No. 3 membrane filtration equipment for filtration under the action of a No. 3 pressure pump, the filtered fruit vinegar is transported to a No. 3 filtration tank, the No. 1 pressure pump, the No. 2 pressure pump and the No. 3 pressure pump are connected with a controller, and the controller is connected with a washing device in a control manner. The multilayer membrane filtration system of the fruit vinegar disclosed by the invention removes macromolecular proteins, colloids, fibers, microorganisms and the like in the fruit vinegar at one time, and the technical requirements can be achieved by one-time filtration, thereby shortening the production cycle.

The invention discloses a magnetic filter device for a crab shell enzymolytic tank. The filter device (7) is characterized by comprising a filter screen (8), a scraper (9), a motor (10), an impurity screen (11), a baffle (12), a magnetic ring (13) and a magnetic rotor (14), wherein the baffle (12) is arranged in front of the filter screen (8) and fixedly connected with the outer wall of a water outlet pipe (6); the magnetic ring (13) externally sleeves the end opening of the filter screen, and is movably connected with the inner wall of the water outlet pipe (6); the magnetic rotor (14) is arranged on the outer wall of the water outlet pipe (6). The magnetic force action of a magnetic material is adopted for the magnetic filter device for a crab shell enzymolytic tank to start a self-cleaning device, and the self-cleaning device has a self-cleaning function, is convenient to operate and good in filter effect; and the filter screen need not to be changed.

The invention particularly discloses an automatic nano material filtering machine and a use method thereof. The automatic nano material filtering machine comprises a funnel, wherein two sides of the funnel are connected with symmetric lifting devices through funnel support shafts, an ultrasonic cleaning machine is arranged below the funnel, and the bottom of the funnel is connected with a vacuum pump. The automatic nano material filtering machine also comprises a cleaning solution pump, wherein the cleaning solution pump is connected with a cleaning solution barrel through a flexible pipe, the cleaning solution barrel is connected with a nozzle device, and the ultrasonic cleaning machine, the cleaning solution pump and the vacuum pump are connected with a control host through a control circuit board. According to the automatic nano material filtering device, the automatic control of the whole filtering process can be realized, and thus errors possibly caused by the manual operation are greatly reduced, and the production safety is improved; according to the automatic nano material filtering device, the large-capacity material filtration can be realized, the filtering time is short and the production efficiency is high; and by adopting the cleaning solution flow control and the rapid nozzle movement, a filter net can be efficiently cleaned, the consumption of the cleaning solution can be reduced, and the production cost is saved.

This invention relates to a filter which is especially for filtering microfibres which can, for example, originate from the washing of textiles. The filter is rotatable around an axis of rotation. The filter provides good filtering efficiency and improved resistance to blocking.

The invention relates to a transformer oil-immersing and filtering device. The transformer oil-immersing and filtering device comprises a vertical cylinder, a boosting pump, a motor and a rotating shaft; an inverted-cone first filter, an inverted-cone second filter, an inverted-cone third filter, an inverted-cone fourth filter and an inverted-cone fifth filter are arranged in the vertical cylindersequentially from top to bottom; a compressed air inlet pipe communicated with a gas inlet is arranged on the outer side of the vertical cylinder; a plurality of discharging ports are formed at the bottom of the vertical cylinder; and discharging pipes communicated with the discharging ports are arranged below the vertical cylinder. The transformer oil-immersing and filtering device is short in filtering time, high in filtering efficiency, good in filtering effect and convenient in washing and cleaning operation, does not need to change the first filter, the second filter, the third filter, the fourth filter and the fifth filter frequently, and has good implementation effect.

This conductive composition contains a conductive polymer (A), a water-soluble polymer other than the conductive polymer (A), and a solvent. When a test solution obtained by extracting the water-soluble polymer (B) from the conductive composition using n-butanol is measured using a high performance liquid chromatograph mass spectrometer, the area ratio calculated by equation (I) below is no greater than 0.44. (I) Area ratio=Y/(X+Y) (In equation (I), X is the sum of peak area values when an extracted ion chromatogram is prepared from the total ion current chromatogram using ions derived from a compound having a molecular weight (M) of at least 600, and Y is the sum of peak area values when an extracted ion chromatogram is prepared from the total ion current chromatogram using ions derived from a compound having a molecular weight (M) of less than 600.)

An energy supply unit for supplying a consumer, includes an energy store to supply electric when the consumer is decoupled from an energy supply network. The energy supply unit includes an energy supply controller having an input coupled to the energy store, via a diode, for receiving electric energy and an output for delivering electric energy, and a monitoring unit for outputting a monitoring signal, configured to set the monitoring signal to an active state when an output voltage between the output and a reference potential is lower/greater than a predefined activation threshold value, the monitoring unit configured, when an excessively low input voltage is identified between the input and reference potential of the controller, especially paired with an excessively low output voltage, the monitoring signal is switched to the inactive state when the input voltage is above a reset threshold and the output voltage is within the monitoring band.

The invention discloses a chemical waste liquid treatment system based on an ultrafiltration rotary ceramic membrane and a treatment method thereof. The system comprises a filtering unit, an adsorption unit and a pH adjusting unit, wherein the filtering unit comprises an outer cylinder; a first rotating shaft is arranged in the outer cylinder; a ceramic membrane is arranged on the first rotating shaft; a first water pipe is connected to the right of the outer cylinder; the adsorption unit comprises an adsorption box; a second motor is arranged at the top of the adsorption box and connected with a second rotating shaft; an activated carbon net is arranged on the second rotating shaft; the adsorption box is connected with a second water pipe; the pH adjusting unit comprises an adjusting box;a third motor is arranged at the top of the adjusting box and connected with a third rotating shaft; and a stirring rod is arranged on the third rotating shaft. By arranging the shaft disc type ceramic membrane for filtration, wastewater with high viscosity can be treated, operation cost is low, the service life of the ceramic membrane is long, and filtration time is short; and a high shear rateis generated on the surface of the ceramic membrane along with high-speed rotation of the ceramic membrane, so rotational-flow sweeping flow is formed, a filter cake layer on the surface of the ceramic membrane is very thin, and blockage can be avoided.